鋁酸酯偶聯(lián)劑

一、產(chǎn)品適用范圍：
適用于各種無機(jī)填料(如碳酸鈣、硅灰石粉、滑石粉、硫酸鋇、葉臘石粉、高嶺土、粉煤灰、海泡石、氧化鋁等),無機(jī)阻燃劑(如氫氧化鎂、氫氧化鋁、硼酸鋅、三氧化銻等)和顏料(如氧化鐵紅、鋅鋇白、鈦白、氧化鋅、立德粉等)的表面活化改性。經(jīng)改性后的填料、色母粒、阻燃劑、顏料，可適用于塑料、橡膠、涂料、油墨、層壓制品和粘結(jié)劑等復(fù)合制品。

二、特點(diǎn)與使用效果
 1、與其它偶聯(lián)劑（如鈦酸酯、硼酸酯等）相比，經(jīng)鋁酸酯偶聯(lián)劑活化改性處理后的無機(jī)粉體，除質(zhì)量穩(wěn)定外，還具有色淺、無毒、味小及對PVC的協(xié)同熱穩(wěn)定性和潤滑性，適用范圍廣，無須稀釋劑，使用方便，價格低廉。
 2、經(jīng)鋁酸酯偶聯(lián)劑活化改性處理的各種無機(jī)粉體，因其表面發(fā)生化學(xué)或物理化學(xué)作用生成一有機(jī)分子層，由親水性變成親有機(jī)性。實踐證明，無機(jī)粉體表面經(jīng)鋁酸酯偶聯(lián)劑改性后用于復(fù)合制品中，偶聯(lián)劑的親無機(jī)端與親有機(jī)端能分別與無機(jī)填料表面和有機(jī)樹脂發(fā)生化學(xué)反應(yīng)或形成纏結(jié)結(jié)構(gòu)，增強(qiáng)了無機(jī)粉體與有機(jī)樹脂的界面相容性，所以用鋁酸酯偶聯(lián)劑改性，不僅可以改善填充無機(jī)粉體的塑料制品的加工性能，而且也可以明顯改善制品的物理機(jī)械性能，使產(chǎn)品吸水率降低，吸油量減少，填料分散勻均。
 3、在生產(chǎn)顏料、油墨、涂料的研磨顏(填)料工序中，可直接投入計量的偶聯(lián)劑，起到改善顏(填)料的分散性，縮短研磨時間，提高細(xì)度、亮度并降低粘度增加材料的附著力的明顯效果。

4、改性CaCO3應(yīng)用PVC型材\管材可大幅增加填充量,同時還保留材料優(yōu)異的力學(xué)性能,如拉伸強(qiáng)度，斷裂伸長率，沖擊強(qiáng)度,同時該型號偶聯(lián)劑的改性生產(chǎn)的PVC管\型材表面光潔度高,無麻點(diǎn),表面光滑,說明鋁酸酯偶聯(lián)劑是一類優(yōu)異的偶聯(lián)劑能起到增強(qiáng)增填作用。同時具有良好的水解穩(wěn)定性。

5、是防霉變性塑料制品的偶聯(lián)劑。

6、偶聯(lián)劑生產(chǎn)的填充母料、色母料、透明母料、吸水母料、降解母料.阻燃母料；其增加量均比普通偶聯(lián)劑生產(chǎn)的制品的增加量明顯大幅度提高,且各項力學(xué)性能穩(wěn)定；斷裂制品伸長率。

7、由于本型號偶聯(lián)劑活化改性的無機(jī)粉體固而應(yīng)用于干粉涂料、油墨、塑膠制品的粘結(jié)力，附著度更強(qiáng)，不易析出褪色等優(yōu)異特點(diǎn)。

三、產(chǎn)品用量

    注：①無機(jī)粉體表面粒徑600-800目偶聯(lián)劑用量為0。7%/無機(jī)粉體表面粒徑800目偶聯(lián)劑用量

為0。8%/無機(jī)粉體表面粒徑1250目偶聯(lián)劑用量為填料量的1.0％。其他工藝成型的制品或發(fā)泡軟制品，用填料量的0.5～1.0％。
        ②對于炭黑、氫氧化鋁、氫氧化鎂、水鎂石粉等具有高比表面或高活性表面的填料，偶聯(lián)劑用量應(yīng)適當(dāng)增加到1.5～2.5％。為了更好發(fā)揮偶聯(lián)劑效果并降低改性成本，建議參照第六條（4）點(diǎn)加入?yún)f(xié)同劑(硬脂酸)。

 四、主要質(zhì)量指標(biāo)：

 五、填料活化改性處理方法：

 1、預(yù)處理法：填料先在高速混合機(jī)(預(yù)熱到物料溫度達(dá)100－110℃)中攪拌烘干(敞口)10～15分鐘，使填料含水量低于0.3％，緩緩加入計量的掐碎的偶聯(lián)劑（注意勿使偶聯(lián)劑被攪拌槳打到混合機(jī)內(nèi)壁），改性時間3～5分鐘。

 2、直接加入法：若填料含水量低于0.3％，可直接在高速機(jī)中捏合時加入偶聯(lián)劑，加入方法同上。但應(yīng)注意硬脂酸、有機(jī)醇之類含羧基、羧基的組份，務(wù)必在加入偶聯(lián)劑對填料進(jìn)行活化改性4分鐘后加入，千萬勿與偶聯(lián)劑先或同時加入，以免偶聯(lián)劑失效。
以上二法，以前法處理的效果好。

六、成功應(yīng)用偶聯(lián)劑的關(guān)鍵：

1、保證偶聯(lián)劑對填料活化改性效果一定要用夾套加熱的高速混合機(jī)進(jìn)行填料的活化改性。
2、用于PE、PP、ABS、PS等粒狀樹脂為原料的復(fù)合制品時，先制成母料或粒料形式，再與這些粒狀樹脂混合應(yīng)用。該型號偶聯(lián)劑生產(chǎn)的填充母料，應(yīng)用與復(fù)合體系，其斷裂伸長率，填充量，表面光澤度，材料韌性等物化性能完全優(yōu)于其他各種偶聯(lián)劑。
3、要保證本偶聯(lián)劑改性的填料與粉狀樹脂(如PVC)及其配合料有良好的塑化效果，建議采用高速捏合之后經(jīng)密煉或塑煉后再擠出切粒。
4、用于無機(jī)粉體改性時，建議加少量硬脂酸作為協(xié)同劑，可在保證質(zhì)量前提下降低成本。硬脂酸用量一般為粉體的0.50％。用法是在高速混合機(jī)中投入偶聯(lián)劑對填料進(jìn)行活化改性3～5分鐘后，加入少量硬脂酸，再高速攪拌3分鐘即可。千萬注意勿與偶聯(lián)劑先加入或同時加入，即可與偶聯(lián)劑起良好的協(xié)同效應(yīng)。如生產(chǎn)PVC管材在偶聯(lián)劑改性3～5分鐘后加入硬酯酸，在大量增加活化好的碳酸鈣可保持PVC管材良好的韌性、抗沖性、并能明顯提高制品光澤度。

 七、儲存方式：

使用過程中產(chǎn)品應(yīng)存于干燥通風(fēng)處、避光、隔熱

 Aluminate coupling agent

1. Product Scope:

Suitable for various inorganic fillers (such as calcium carbonate, wollastonite powder, talc powder, barium sulfate, pyrophyllite powder, kaolin, fly ash, sepiolite, alumina, etc.), inorganic flame retardants (such as magnesium hydroxide, Surface activation modification of aluminum hydroxide, zinc borate, antimony trioxide, etc.) and pigments (such as iron oxide red, zinc barium white, titanium white, zinc oxide, lithopone, etc.). The modified filler, masterbatch, flame retardant, and pigment can be applied to composite products such as plastics, rubber, paints, inks, laminates, and adhesives.

2. Features and effects

 1. Compared with other coupling agents (such as titanate, borate, etc.), the inorganic powder activated and modified by the aluminate coupling agent, in addition to stable quality, also has light color and non-toxic , Small taste and synergistic thermal stability and lubricity to PVC, a wide range of application, without thinner, easy to use and low price.

 2. Various inorganic powders that are activated and modified by aluminate coupling agent generate an organic molecular layer due to chemical or physicochemical effects on the surface, which changes from hydrophilic to organic. Practice has proved that the surface of inorganic powder is modified by aluminate coupling agent and used in composite products. The inorganic and organic ends of the coupling agent can chemically react or b entanglement with the surface of inorganic filler and organic resin, respectively Structure, enhances the interface compatibility of inorganic powder and organic resin, so modified with aluminate coupling agent can not only improve the processing perbance of plastic products filled with inorganic powder, but also significantly improve the physical machinery of the product The perbance reduces the water absorption rate of the product, reduces the oil absorption, and evenly disperses the filler.

 3. In the process of grinding pigments (filling) for the production of pigments, inks, and coatings, the metered coupling agent can be directly b to improve the dispersion of the pigments (filling), shorten the grinding time, and improve the fineness and brightness. The obvious effect of reducing the viscosity and increasing the adhesion of the material.

4. Modified CaCO3 application of PVC profiles \ pipes can greatly increase the filling amount, while still retaining the excellent mechanical properties of the material, such as tensile strength, elongation at break, impact strength, and the production of PVC modified by this type of coupling agent The surface of the tube \ profile has high smoothness, no pitting, and smooth surface, which indicates that the aluminate coupling agent is a kind of excellent coupling agent that can enhance the filling effect. At the same time, it has good hydrolytic stability.

5. It is a coupling agent for anti-mildew plastic products.

6. Filling masterbatch, color masterbatch, transparent masterbatch, water-absorbing masterbatch, degradable masterbatch produced by coupling agent. Flame retardant masterbatch; the increase is significantly larger than that of products produced by ordinary coupling agent Increased and stable mechanical properties; elongation of broken products.

7. Because the inorganic powder solid modified by this type of coupling agent is activated and applied to dry powder coatings, inks, and plastic products, the adhesion is stronger, the adhesion is stronger, and it is not easy to precipitate out fading and other excellent features.

3. Product dosage

    Note: ① The dosage of the coupling agent with an inorganic powder surface particle size of 600-800 mesh is 0.7% / the dosage of the coupling agent with an inorganic powder surface particle size of 800 mesh

It is 0.8% / the inorganic powder surface particle size 1250 mesh coupling agent dosage is 1.0% of the filler. For products bed by other processes or foamed soft products, 0.5 to 1.0% of the amount of filler is used.

        ② For carbon black, aluminum hydroxide, magnesium hydroxide, brucite powder and other fillers with high specific surface or high active surface, the amount of coupling agent should be appropriaby increased to 1.5 to 2.5%. In order to better exert the effect of the coupling agent and reduce the modification cost, it is recommended to add a synergist (stearic acid) according to point 6 (4).

 4. Main quality indicators:

Product appearance Melting temperature (℃) Viscosity reduction range (%) Melting time (minutes) Refractive index Thermal decomb degree (℃)

White waxy solid or powder 55 ～ 65 ° ≥98.0 ≤4 1.450 + 0.01 ≥320 °

Shelf life consumption The main applicable bs of inorganic powder modified by coupling agent

18 months Filler dosage 0.5-1% Medium and low polarity composite products such as PP, PVC, PE, PS, ABS, etc. or other natural rubber

 V. Filler activation modification treatment b:

 1. Pretreatment b: The filler is first stirred and dried (open) in a high-speed mixer (preheated to a material temperature of 100-110 ℃) for 10 to 15 minutes to make the filler moisture content less than 0.3%, and slowly add to the metering Crushing the coupling agent (be careful not to make the coupling agent hit the inner wall of the mixer by the stirring paddle), the modification time is 3 to 5 minutes.

 2. Direct addition b: If the water content of the filler is less than 0.3%, the coupling agent can be added directly when kneading in the high-speed machine. The addition b is the same as above. But should pay attention to the stearic acid, organic alcohol and other components containing carboxyl group and carboxyl group, be sure to add the coupling agent to activate the filler after 4 minutes, do not add it first or at the same time with the coupling agent to avoid accident The joint agent fails.

The above two bs, the effect of the previous b is good.

6. The key to successful application of coupling agent:

1. To ensure the activation and modification effect of the coupling agent on the filler, the high-speed mixer heated by the jacket must be used to activate and modify the filler.

2. When it is used for composite products such as PE, PP, ABS, PS and other granular resins, it is first made into a masterbatch or pellet b, and then mixed with these granular resins for application. The filling masterbatch produced by this type of coupling agent is used in composite systems. Its elongation at break, filling amount, surface gloss, material toughness and other physical and chemical properties are compleby superior to other coupling agents.

3. To ensure that the filler modified by this coupling agent has good plasticizing effect with powdered resin (such as PVC) and its ingredients, it is recommended to use high-speed kneading and then extruding and pelletizing after dense mixing or plasticizing.

4. When used for inorganic powder modification, it is recommended to add a small amount of stearic acid as a synergist, which can reduce the cost under the premise of ensuring quality. The amount of stearic acid is generally 0.50% of the powder. The usage is to put coupling agent into the high-speed mixer to activate and modify the filler for 3 to 5 minutes, add a small amount of stearic acid, and then stir at high speed for 3 minutes. Do not add it first or at the same time with the coupling agent, you can have a good synergistic effect with the coupling agent. For example, in the production of PVC pipes, stearic acid is added after 3 to 5 minutes of modification with the coupling agent, and a large amount of activated calcium carbonate can maintain the good toughness and impact resistance of PVC pipes and can significantly improve the gloss of the products.

 7. Storage b:

The product should be stored in a dry and ventilated place, protected from light and heat during use